Solder for aluminium.



. UNITED STATES PATENT OFFICE.

OARLETON ELLIS, OF BOSTON, MASSACHUSETTS, ASSIGNOR TQ.N ATHANIEL L. FQSTER,

. TRUSTEE, OF BROOKLINE, MASSACHUSETTS.

SOLDER FOR ALUMINIUM.

To all whom it may concern:

Be it known that I, OARLETON ELLIs, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Solder for Aluminium, of which the following is a specification.

The object of this invention is to provide a solder for aluminium which shall be strong and durable, shall be of low fusing point and shall unite easily with aluminium. My solder consists of an alloy of tin, zinc, aluim'nium and manganese. Tin isv the constituent used in greatest relative amount. The manganese is added only in relatively small quantity. This latter ingredient is used to improve the texture of the solder and to increase the du'rability of the soldered joint. Chromium may be added to the solder if desired.

Suitable proportions for a satisfactory solder are tin 30 parts, zinc 7 parts, aluminium part, manganese part, or using chromium with manganese, tin 30 parts, zinc 8 parts, aluminium 1 part, manganeseq. s., chromium part. Y

I do not limit myself to the exact formulae as given Specification of Letters Patent. Application filed January 12, 1904. Serial No. 188,735-

A above described elements.

Patented Aug. 13, 190?.

above. These proportions may be varied to a considerable degree without materially affecting the action of the solder. Theratio of zinc to tin is especially capa- 2 5 ble of variation.

The solder may be prepared by fusing together the If desired the manganese or chromium may be added in the form of their respect'ive aluminum alloys. To secure the best results the 30 fusion should be made in a closed crucible, as free access of air to the fused alloy appears to injure the working qualities of the resulting solder.

What I claim as my invention and desire to secure by Letters Patent is V 1. Solder for aluminium consisting of tin, zinc, aluminium and manganese.

2. Soldering composition which consists largely of tin, zinc and aluminium associated with a modicum of manganese. i 40 In testimony whereof I have affixed my signejure, in presence of two witnesses.

H CARLETON ELL-IS.

Witnesses Fnnnnnrc G. CHISHOLM, MAJQE WILLIAM BARBER. 

